Bosch Dishwasher Error Code E09 — What It Means & How to Fix It

What Does This Error Mean?

The E09 error on your Bosch dishwasher means there is a fault in the heating circuit. The control board detected that the heating element is broken or its wiring has failed. This is a hardware problem that usually requires professional repair.

Affected Models

Bosch 300 Series
Bosch 500 Series
Bosch 800 Series
Most Bosch built-in dishwashers

Common Causes

The heating element has burned out completely and no longer conducts electricity
A wire connecting the heating element to the control board has broken or corroded
The thermal fuse on the heating element has blown as a safety measure
The control board relay that powers the heater has failed
Limescale buildup on the heating element caused it to overheat and fail

How to Fix It

Turn off the dishwasher and unplug it from the wall. Wait five minutes, then plug it back in and try a cycle.

This rarely fixes E09, but it is worth trying to rule out a temporary glitch.
Check if the dishwasher has been tripping your home's circuit breaker recently. A short in the heating circuit can cause this.

If the breaker trips when the dishwasher runs, stop using it and call a technician immediately.
Run a short rinse-only cycle to see if the dishwasher works without the heater. This confirms the heater is the issue.

If the rinse cycle works fine, the heating circuit is the confirmed problem.
If you are comfortable with appliance repair, you can test the heating element with a multimeter for continuity.

Unplug the dishwasher first. The element should show some resistance. No reading means it is burned out.
Call a qualified technician to replace the heating element or diagnose a control board issue.

The heating element costs $40–$100. A control board costs $150–$300. Labor adds $100–$150.

When to Call a Professional

E09 almost always requires a technician. The heating element or control board likely needs replacing. Do not try to bypass or reset this error repeatedly. Expect repair costs of $200–$450 depending on whether the element or board needs replacing.

Frequently Asked Questions

Can I still use my Bosch dishwasher with the E09 error?

You should not. The dishwasher will not heat water, so dishes will not be cleaned or sanitized. Running it repeatedly with a broken heater can also stress other components. Get it repaired before using it again.

What causes a dishwasher heating element to burn out?

Limescale buildup is the most common cause. Hard water deposits insulate the element, making it overheat. Over time the metal cracks or burns through. Using a dishwasher cleaner monthly can help prevent this.

Is it worth repairing an E09 error or should I buy a new dishwasher?

If your dishwasher is under five years old, repair is almost always worth it. A heating element replacement costs $200–$300 total. A new Bosch dishwasher costs $700 or more. If the machine is over ten years old, consider replacing it.